knfsd: allow cache_register to return error on failure
Newer server features such as nfsv4 and gss depend on proc to work, so a
failure to initialize the proc files they need should be treated as
fatal.
Thanks to Andrew Morton for style fix and compile fix in case where
CONFIG_NFSD_V4 is undefined.
Cc: Andrew Morton <akpm@linux-foundation.org>
Acked-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/include/linux/nfsd_idmap.h b/include/linux/nfsd_idmap.h
index e82746f..d4a2ac1 100644
--- a/include/linux/nfsd_idmap.h
+++ b/include/linux/nfsd_idmap.h
@@ -44,11 +44,16 @@
#define IDMAP_NAMESZ 128
#ifdef CONFIG_NFSD_V4
-void nfsd_idmap_init(void);
+int nfsd_idmap_init(void);
void nfsd_idmap_shutdown(void);
#else
-static inline void nfsd_idmap_init(void) {};
-static inline void nfsd_idmap_shutdown(void) {};
+static inline int nfsd_idmap_init(void)
+{
+ return 0;
+}
+static inline void nfsd_idmap_shutdown(void)
+{
+}
#endif
int nfsd_map_name_to_uid(struct svc_rqst *, const char *, size_t, __u32 *);